Dutch sand suction dredger Grinza I launched at Wartena, Netherlands according to the Dutch newspaper Nieuwsblad van het Noorden dated 29 February 1954

An item reported the launching of the sand suction dredger Grinza I at the shipyard N.V. Scheepswerf G. Bijlsma en Zonen at Wartena for account of the Dutch firm Aannemersbedrijf De Vries en Van der Wiel at Hilversum. She measured around 900 ton and with fitted out with a Bolnes diesel engine supplying 480 hp at 475 rpm. There was accommodation for two families. Immediately after the launching was the keel laid down of a sister ship for account of the same firm.